Rule 8.3 - BRITISH ENERGY GROUP

FORM 8.3 DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE (Rule 8.3 of the City Code on Takeovers and Mergers) 1. KEY INFORMATION Name of person dealing BARCLAYS PLC (Note 1) Company dealt in BRITISH ENERGY GROUP Class of relevant security ORD GBP0.10 to which the dealings being disclosed relate (Note 2) Date of dealing 21 May 2008 2. INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE (a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3) Long Short Number (%) Number (%) (1) Relevant 44,839,524 4.34% 154,620 0.01% securities (2) Derivatives 186,765 0.02% 1,310,689 0.13% (other than options) (3) Options and 22,800 0.00% 22,800 0.00% agreements to purchase/sell Total 45,049,089 4.36% 1,488,109 0.14% (b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3) Class of Long Short relevant security: Number (%) Number (%) (1) Relevant securities (2) Derivatives (other than options) (3) Options and agreements to purchase/sell Total (c) Rights to subscribe (Note 3) Class of relevant security: Details 3. DEALINGS (Note 4) (a) Purchases and sales Purchase/sale Number of Securities Price per unit (GBP) Purchase 185,951 7.0925 Purchase 401 7.2000 Purchase 27,549 7.1958 Purchase 4,207 7.1384 Purchase 581 7.2000 Purchase 17,663 7.2011 Purchase 1,283 7.1000 Purchase 31,407 7.1679 Sale 1,277 7.1500 Sale 2,015 7.1700 Sale 11,737 7.2063 Sale 1,283 7.1000 Sale 107,135 7.2135 Sale 185,951 7.0925 Sale 1,283 7.1950 Sale 37,470 7.1848 Sale 15,900 7.2069 Sale 81,486 7.1927 Sale 185,951 7.0925 Sale 9,072 7.2000 Sale 20,866 7.1986 (b) Derivatives transactions (other than options) Product name, Long/Short Number of Price per (e.g. CFD) (Note 6) Securities unit (GBP) CFD Long 1277 7.15 CFD Long 2015 7.17 CFD Long 37470 7.1847 CFD Long 81486 7.1926 CFD Long 20866 7.1986 CFD Long 11737 7.2062 CFD Long 15900 7.2068 CFD Long 107135 7.2135 CFD Short 4207 7.1384 CFD Short 31407 7.1678 CFD Short 27549 7.1958 CFD Short 581 7.2 CFD Short 17663 7.201 (c) Options transactions in respect of existing securities (i) Writing, selling, purchasing or varying Product name, Writing, Number of Exercise Type, e.g. Expiry Option money e.g. call selling, securities to price American, date paid/received option purchasing, which the option European etc. per unit (GBP) varying etc. relates (GBP) (ii) Exercising Product name, e.g. Number of Exercise price per call option securities unit (Note 5) (d) Other dealings (including new securities) (Note 4) Nature of transaction Details Price per unit (Note 8) (if applicable) (Note 5) 4. OTHER INFORMATION None Agreements, arrangements or understandings relating to options or derivatives Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated. Is a Supplemental Form 8 attached? (Note 9) NO Date of disclosure 22 May 2008 Contact name Geoff Smith Telephone number 020 7116 2913 If a connected EFM, name of offeree/offeror with which connected If a connected EFM, state nature of connection (Note 10) Notes The Notes on Form 8.3 can be viewed on the Takeover Panel's website at www.thetakeoverpanel.org.uk

Companies

Barclays (BARC)
UK 100